enclosure style

The phaser effect appears when a signal is mixed with the same signal that's a little out of phase (90°, 180°,...). This causes certain frequencies (very narrow bands) to be muted. That's why a phase shifter is also called an all-pass filter.

If the amound of the "shift" is fixed it's hard to tell the difference, but when it's moving you can hear it.

A frequency-based effect that makes a swirling, swooshing filtered guitar tone. Phasers use the principle of “phase” cancellation in which a filter passes over your guitar tone flipping the waveform at specific frequencies. This signal is then combined with your original guitar tone to give the iconic phaser effect used in songs by Van Halen, Pink Floyd and Smashing Pumpkins to name a few.A frequency-based effect that makes a swirling, swooshing filtered guitar tone. Phasers use the principle of “phase” cancellation in which a filter passes over your guitar tone flipping the waveform at specific frequencies. This signal is then combined with your original guitar tone to give the iconic phaser effect used in songs by Van Halen, Pink Floyd and Smashing Pumpkins to name a few.